49results about How to "Reduce uneven deformation" patented technology

Methods and apparatus are disclosed for peripherally supporting X-ray-reflective mirrors such as used in X-ray microlithography systems and other X-ray optical systems. The methods provide effective physical support while reducing certain deformations in the reflective surface of the mirror. An embodiment of the method or mirror-support apparatus utilizes multiple “pushing” and “pushing” devices that apply a compressive stress and tensile stress, respectively, to respective locations on the peripheral-side surface of the mirror. One or more pushing devices and one or more pulling devices can be used as required. For example, at time of mirror fabrication, respective pushing devices can be placed adjacent concave-deviation regions and respective pulling devices can be placed adjacent convex-deviation regions on the reflective surface of the mirror. (Each pushing device produces an offsetting convexity in the adjacent mirror material, and each pulling device produces a corresponding concavity in the adjacent mirror material.) Thus, form errors arising at fabrication time are offset while simultaneously supporting the mirror.

The invention relates to a permafrost region expressway flaky and blocky stone ventilation roadbed and a construction method thereof. The construction safety and the service life are severely influenced caused by the lengthways cracking of the roadbed, the roadbed size effect under the asphaltpavement and the like because of the hot melting and the sinking of the permafrost roadbed. The construction method comprises the following steps of: impacting, laminating and filling 30cm of lower gravel cushion layer at a soil arching base; impacting and laminating the lower gravel cushion layer under the ground line; building a flaky and blocky stone layer with the thickness of 0.9m-1.5m on the lower gravel cushion layer; flattening the upper part of the flaky and blocky stone layer by a macadam transition layer with the thickness of 20cm; filling an upper gravel cushion layer with the thickness of 30cm; paving a water-permeable geotextile between the upper gravel cushion layer and the macadam transition layer; distributing a geogrid which is made from the plastic steel at the upper part of the upper gravel cushion layer; and compacting by a heavy type vibratory roller layer by layer. Therefore, the melting of the permafrost roadbed and the uneven deforming of the permafrost roadbed can be reduced, the influence of the climate warming and the human engineering activity to the permafrost roadbed characteristic can be reduced, and the safety and the flaky and blocky stone stability of the roadbed structure can be improved.

The invention discloses a lubricant for a hot extrusion molding titanium alloy pipe as well as a preparation method and application thereof, which belongs to the field of lubricants and preparation thereof, and aims to solve the technical problems of poor fluidity and easy peeling and cracking of the existing glass lubricant in the extrusion lubrication process. The lubricant for the hot extrusionmolding titanium alloy pipe is prepared from the following components in parts by mass: 35 to 45 parts of SiO2, 2 to 4 parts of Al2O3, 18 to 28 parts of B2O3, 17 to 21 parts of Na2O, 5 to 8 parts ofCaO, 1 to 5 parts of MgO, 1 to 8 parts of BaO, 1 to 5 parts of ZnO and 1 to 2 parts of LiO. The preparation method comprises the following steps of 1, uniformly mixing materials according to a formula, and then heating and smelting to obtain molten glass, and 2, pouring into cold water, carrying out cold quenching, drying, carrying out ball milling, drying, and screening to obtain the lubricant. The lubricant can be used as a lubricant for hot extrusion molding of titanium alloy pipes. After the TC4 titanium alloy coated with the lubricant coating is extruded, the surface of a pipe is integrally smooth, other obvious defects such as longitudinal and transverse scratches are avoided, and the overall surface quality is superior to the surface quality of the pipe extruded by a lubricant in the traditional process.

The invention relates to a method for improving the wall-thickness uniformity during a large-sized thick-wall pipe vertical hot extrusion process. The method for improving the wall-thickness uniformity during the large-sized thick-wall pipe vertical hot extrusion process belongs to the technical field of large-sized thick-wall pipe hot extrusion forming, and comprises the process steps and control technical parameters as below: one end of a pipe blank to be extruded is processed to a specific shape; mold preheating temperature is set: for a heat-resisting steel material, the mold preheating temperature is 400 to 450 DEG C, and for a heat-resisting alloy material, the mold preheating temperature is 350 to 400 DEG C; the pipe blank extrusion minimum limit temperature is controlled: for the heat-resisting steel material, the extrusion minimum limit temperature is 1,000 to 1,010 DEG C, and for the heat-resisting alloy material, the extrusion minimum limit temperature is 1,030 to 1,040 DEG C; and reasonable glass lubricant type and granularity are selected according to extrusion characteristics of different positions. The method for improving the wall-thickness uniformity during the large-sized thick-wall pipe vertical hot extrusion process has the advantages that the metal uniformity flow of the pipe blank during a stable extrusion process is greatly improved, the wall-thickness uniformity during the large-sized thick-wall pipe hot extrusion process is remarkably improved, meanwhile, the cost of raw materials is saved by 20 percent, the service life of a mold is prolonged by 20 percent, the labor productivity during the extrusion process is improved by 15 percent, and about 70 percent of workload of follow-up cutting processing is reduced.

The invention discloses a settlement deformation monitoring pier and an erection construction method thereof. The settlement deformation monitoring pier comprises a pier body of the monitoring pier, a protective insulating structure is arranged on the outer wall of the pier body of the monitoring pier, and three parts such as a light-shading rain-blocking structure are arranged at the top of the pier body. According to the settlement deformation monitoring pier and the erection construction method thereof, the influence of temperature change and lighting of the outside world on settlement monitoring is reduced, and thus the monitoring construction quality is ensured.

The invention provides a short-process rolling method for a cold-rolled 5182 alloy tank cover material, and solves the problems that cold rolling is divided into six passes, and each pass is drifted, so that in the rolling process, the consumed time is long, the working efficiency is low, the number of times on a machine is increased and the probability of generation of bumping defects is also increased. The method comprises the following steps of: 1, single-stand cogging, wherein the thickness of a plate subjected to single-stand cold rolling is converted from 2.8 mm to 1.38 mm; 2, double-stand edge trimming, wherein the thickness of the plate subjected to double-stand cold rolling is converted from 1.38 mm to 0.76 mm and then converted to 0.46 mm, then the plate subjected to cold rolling is cooled to the rolling temperature of 60 DEG C and then is transferred to a finishing edge trimmer, and the edges of the plate are cut by 20 mm separately; 3, single-stand cold rolling, wherein the thickness of the plate subjected to single-stand cold rolling is converted from 0.46 mm to 0.3 mm; and 4, single-rack cold rolling, wherein the plate treated in the step 3 is transferred to a single stand to be subjected to finished product cold rolling treatment, and cold rolling is conducted on the plate through the single stand. The method is simple in structure and has extremely high universality.

The invention relates to an anchor rod combined anti-floating system. The anchor rod combined anti-floating system comprises a plurality of main anti-floating anchor rod assemblies, and the adjacent main anti-floating anchor rod assemblies are connected through channel steel purlines; and each main anti-floating anchor rod assembly comprises a drill hole, an anchor rod body, a polygonal base plate, a conventional base plate and a plurality of I-shaped cushion blocks, wherein an anchor rod hole is formed in the middle of the polygonal base plate and the middle of the conventional base plate, the anchor rod body is arranged in the anchor rod hole in a penetrating mode, and the I-shaped cushion blocks are assembled between the polygonal base plate and the conventional base plate. The anchor rod combined anti-floating system is simple in structure and ingenious in design, has the characteristics of being low in construction cost, good in structural reliability, high in adaptability and the like, and has good construction convenience.

A structure of a rubber sealing ring radial sealing connector with an automatic centering section is characterized by comprising an unthreaded hole lining connector, a rubber sealing ring, a cap nut and a flat-end connecting mouth with a sealing ring groove. The structure of the rubber sealing ring radial sealing connector with the automatic centering section realizes sealing through extrusion deformation of the rubber sealing ring installed on the flat-end connecting mouth with the sealing ring groove after installation of the rubber sealing ring. The unthreaded hole lining connector and theflat-end connecting mouth with the sealing ring groove are axially connected through the cap nut. The structure of the rubber sealing ring radial sealing connector with the automatic centering sectionhas the advantages of effectively realizing the automatic centering function of connector matching, lowering non-uniform deformation of the sealing ring and touch abrasion of the sealing surface of the connector, lowering torsion and tearing faults caused by fretting wear accumulation generated by large partial deformation after long-time use of the rubber sealing ring, and improving the use reliability of the sealing structure.

The invention discloses a cold machining method for a GH4099 high-temperature alloy wire, belongs to the technical field of high-temperature alloy wire preparation, and provides the cold machining method for the GH4099 high-temperature alloy wire, which can improve the surface quality of the wire. The cold machining method comprises the steps that A, solid solution heat treatment is carried out; B, intermediate billet rotary swaging reducing treatment is carried out, specifically, multi-pass annealing rotary swaging reducing treatment is carried out on a bar obtained in the step A through a rotary swaging process, and the rotary swaging deformation of each pass is controlled to be 30% - 45%; and after each pass of rotary swaging reducing treatment, a vacuum heat treatment furnace is adopted for annealing treatment, the vacuum degree is less than 10 <-3> Pa, the annealing temperature is 1050 DEG C - 1100 DEG C, and the heat preservation time is 10 min - 30 min; and C, a finished productis prepared. A wire product prepared through the cold machining method is uniform in structure distribution and free of coarse grain structure; and the surface of the wire is free of defects such ascracks and pits, and the wire has the characteristics of being high in dimensional precision, excellent in surface quality and the like.